Club Deportivo Guadalajara, known as Chivas, keeps a “política estricta de jugar únicamente con futbolistas mexicanos” (strict policy of playing only with Mexican footballers), in the words of the sports newspaper Récord. Récord dates the tradition to around 1908 and says it was consolidated in 1943. Other accounts say that the club had foreign players in its early years and accepted only Mexicans from the 1940s. (Video in Spanish.)
In June 2021, the ESPN commentator David Faitelson called the policy discriminatory. His colleague Roberto Gómez Junco answered that it is an internal rule of the club and does not violate the Constitution.